Which statement about the positive and negative value of speed compared to velocity is true?
A. Velocity in one dimension always has a negative value, while speed always has a positive value.
B. Velocity and speed in one dimension both have positive and negative values
C. Speed in one dimension may be positive or negative, while velocity always has a positive value.
D. Velocity in one dimension may be positive or negative, While speed always has a positive value.
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